PEROXYLAMINESULPHONATES AM» BYDROXYLAMINETRISULPHONATES. :;', 



normal hydroxylaminedisulphonate weighed L*55 grains, this bein" 1 

 equal to 7<i per cent, of the calculated quantity. It was pure, excepl 

 for n trace of aminetrisulphonate (nitrilosulphate), doubtless due 

 to the action of the sulphurous acid unavoidably liberated in 

 the process of separating the barium sulphite from its own 

 barium salt by acetic acid. Jt was identified by hydrolysis into 

 sulphate and hydroxylaminemonosulphonate, and above all by its 

 producing the bluish-violet peroxylaminesulphonate when warmed 

 with lead peroxide and a small quantity of alkali. No nitrite was 

 found in the mother liquor of the hydroxylaminetrisulphonate, 

 showing that the production of the latter salt had not been clue to 

 spontaneous decomposition of the peroxylaminesulphonate. Hydroxyl- 

 aminetrisulphonate and disulphonate are, in fact, the only substances 

 which could be detected among the products of the interaction of 

 the peroxylaminesulphonate and sulphite. Since, therefore, the 

 separated quantities of these products were found to be in approximate- 

 ly molecular proportions, and as these salts are not insoluble, even 

 in their alcoholic mother liquors, it may be regarded as proved thai 

 the interaction which takes place is exclusively that represented by 

 the equation on page 18. 



Spontaneous Decomposition of Votassium 'Peroxylaminesulphonate, — ■ 

 The principal products of the spontaneous decomposition of a peroxyl- 

 aminesulphonate in hot alkaline solution ;uv easy to recognise. 

 I nless very dilute, the solution yields crystals on cooling and more 

 on evaporation. At first the sparingly soluble hydroxy laminetri- 

 sulphonate alone crystallises, and later on both this and the equally 

 sparingly soluble hydroxvlaminedisulphonate. In each case the 

 crystals are characteristic and easily distinguished. The presence of 

 the disulphonate in the solution is quickly and distinctively indicated, 

 as has just been mentioned, by warming with a small quantity of 



